William henby davenpobt bbouse



All@ 20, 1929- w. H. D. BRoU'sE 4 1,725,390 l PUMP Filed July 8, 1926 VIIIIIII Patented 20, 1929.

UNITED STATES WILLIAM HENRY DAvENrOnT BaoUsvE, or TORONTO, ONTARIO, CANADA'.`

PUTZPL-Y Application med 'my s, 192e.- s'eril No. 121,155.

' The principal objects of the invention are to provide a small high speed, high pressure pump which will belparticularly adaptable for use in small refrigeration plants, such as are required for domestic refrigeration.

A further and important object is to devise a structure which will operate at high speed without noise.

The principal feature of the invention consists in the novel'construction and arrangement of parts whereby' the full working pressure completely surrounds the compressor member within a closed chamber and such pressure is also applied to the eccentric compressing rotor, maintaining a high pressure seal completely around the compression chamber. y

A further important feature consists in the novel manner ofA lubricating the working parts under full working pressure.

A still further feature of importance e'onsists in the novel construction and arrangement of a separating chamber in the casingof the pump to separate the oil from the compressed air or gas, anda still further feature consists in the novell construction of the drive shaft whereby adverse stresses are eliminated. i p

In the drawings, Figure 1 is a side elevational view of the pump and direct connected motor for driving same.

Figure 2 is an enlarged plan view of the pump -with the cover of the separating chamber removed. A A

Figure 3 is a vertical mid-sectional elevationon the line 3 3 of Figure 2.

Figure 4 is a vertical cross section through the line 4-4 of Figure 3.

Referring. tothe accompanying drawings, it will be seen that the pump casing 1 is of rectangular form being a solid casting provided with the supporting feet 2 which are secured to a suitable base 3 which is here shown in the form of a pair of angle irons which are preferably supported on springs 4. One face of the casing 1 is formed with a rectangular Orifice 5 which is sealed by the cap end 6 secured by suitable cap screws 7. The cap 6 is formed with a journal extension 8 inwhich the operating shaft 9 is j ournalled.

A suitable packing gland 10 is arranged at4 the outer end of the extension 8 surrounding the shaft.

A circular chamber 11 encircles the journal bearing adjacent tO the outer end and is connected by a downwardly and inwardly eli--y tending passage 12 which connects with the inlet port 13 which enters the cap from the side edge and connects with the port 14 Opening into the inner face of the cap.

The pump cylinder is here shown formed of a solid metal block 15, preferably cast Ilron, having the cylindrical chamber. 16 bored therethrough. This block is secured to the face of the cap 6 Within the casing l by sultable bolts which pass through the bolt holes 17. 1

The block 15 isformed with a vertical slot 18 cut completely therethrough from the bottom end into -the cylinder chamber. It is found thatv upon slotting this vblock the compresslon stresses in the metal cause the sides of the slotto draw inwardly, tending to close it. A cyhndrical hole 19 is bored in the end of the block so that it is'bi-sected by the 'slot `18 and the lower end thereof is threaded with a taper thread'to receive the hollow taper plug 20.

A flat blade 21 is inserted inthe slot 18V and extends inwardly into the cylinder chamber 16, being spring held inwardly by a coil compression spring 22 enclosed in the hole 19 by the plug 20. flhe blade is formed with a s lot 23 in its lower end to receive the spring.

This construction is very simple 'and by adjusting the taper plug 20 the desired sliding contact between the blade and the block can be very easily obtained .without the nelcassdity of grinding or otherwise fitting the A cylindrical bloei; 24 which may be made l of hardened steel is eceentrically mounted and fixed on the shaft 9 and surrounding this block is a hardened steel ring 25 which is supported from the block by the roller bearings 26. The periphery ofthe ringl 25 en gages the inner wall of the cylinder'chainber 16 at a point on its circumference and has a rolling contact therewith and the blade 21 is held in spring contact with the periphery of the ring and reciprocates in the slot 18 as the ring is rotated.

The inlet port 14 in the. inner face of the cap 6 is arranged at one side of the blade 21 and an outlet port 27 is cut in the cylinder wall atthe other side of the blade and at the inward side of the block, that is, at the side of the block opposite to the inlet port 14.

A cap plate 28 corresponding in shape to the inner face of the cylinder block 15 is secured to the inward face thereof by the bolts which extend through the bolt holes in the cylinder block 'and this cap plate is formed with a journal bearing 29 to support the inward end of the shaft. e.

A channel 30 is formed in the cap plate 28 to communicate with the outlet port 27 and it leads angularly upward to a port 31 entering the shaft journal. The inner end of the shaft is formed with a hole 32 communicating with the port 31 and opening outwardly at the end through the open end of the 'journal into the interior of the casin 1.

pair of rubbing washers 33, preferably of brass, are arranged withinthe ends of 'the ring 25 to engage thel ends of the rollers to avoid the possibility of cutting the casing and the working end faces of the cylinder. The ends of the ring are a snug iworkinglit between the" inner faces of the caps 6 and 28.

'A hole 34 is bored in the cap 28 leading upwardly from the bottom end thereof and opening inwardly at the inner periphery of the ring 25. This hole conducts oil under pressure to the interior f the ring and ene sures t-he thorough lubrication of the ring and of the rollers and the full working pres- .sure ofthe pump is applied tothe oil so that the end surfaces of the ring are always lubricated.

It will be seen thatas the shaft is rotated the eccentric block causes the ring 25 to roll around the inner periphery ofthe -cylinder compressing air or gas in the cylinder chamber into the port 27 and channel 30 but it is not allowed to escape into the casing 1 until the port 31 is openedby lthe hole 32 in the shaft registering therewith. This hole can be arranged at any suitableA point in relation to the position ofthe eccentric rotor f to accomplish the desired result. This ar- 25 and the surfaces of the blade 21.

rangement prevents the stored pressure from flowing back into the compression chamber.

Y The blade 21 maintains a constant work-` ing contact against -the perimeter of the ring 25 and leakage past the blade is prevented by the ilm of oil maintained therein by the working pressure in the ,casing 1. The casing 1 is lilled with oil to a level above the bottom of the -cylinder'chamber 16 and the air or gas pressure in the top of the casing 1 maintains a constant pressure from the bot- .tom of the slot18 inwardly towards the cyl.-

inder chamber. The oil pressure also is carried through the hole 34 in the cap plate to the 'interior of the ring 25. It'will thus be seen that the pressure in the compression fchamber will'be opposed by the pressurev in the casing and will notforcathe oil film -from between the working edges -of the ring cylinder cap' or from the working This construction produces a highly Vetlicient compressor which may be operated at very high speed and there is no noi will produce very high pressure.

se and it.

The gas or air compressed is forced into l the interior of the casing 1 and is `discharged therefrom through a pipe 35 which opens through the top of the casing into a cham-- ber 36. This chamber is provided with a.'v

plurality of baflles 37 and the bottom wallv of the chamber slopes -to a trough 38at one end and any oil vapour carried with the gas will be separated from the gas within this chamber and will flow down the inclined surface to the trough 38 which is connected to a pipe 39.leading into the interior of the casing 1 and to a point close to the bottom` and is sealed by the oil in thisA casing.

.The chamber 36 is closed by a suitablecap I 40- in whichan outlet pipe arrangedkat theA end of the bailie chamber 36 leads.

It will be noted thatythe application of oil pressure tothe centre of the rotor directs a flow of oil around the shaft 9 outwardly through the journal in the extension 8 and also outwardly through the journal in the cap plate 28. The oil forced outwardly through the journal extension' 8 is trapped in the ringchamber 1l and flows through the passage 12 to the linlet pdrt where it is drawn back into the cylindenwith the inflowing air or gas. Complete pressure lubri-l cation of the entire working parts is thus obtained.

The device is of such a nature that it can Abe operated at very high ispeed and is there- One of the coupling members isprovided with a fan 45 which creates a draft to ventilate the motor and effect the cooling of the pump casing by rapid circulation of air.

It will Ibe understood from this description that the construction is extremely compact and simple. There are no complex low. cost and will operate indefinitely without attention. f

What I claimv as my invention is 1,'A pump comprising a cylinder, a hollow eccentric rotor arranged in said .cylinder, a casing connected with said cylinderv andv receiving the full working discharge pressure from the pump and enclosing a quantity of sealing lubricant, and a passage leading from 'the casing below the lubricant working parts and no valves to get o ut of i order and it can be manufactured at a very.

- cylinder chamber t erein, a slot opening to a the cylinder chamber through said bloc blade slidably arranged in said slot and extending into the cylinder chamber, an eccentric rotor arranged in the cylinder and operatively engaging ysaid blade, ,means for spring holding said blade in engagement with the rotor, said block having 4an inlet port arranged at one side of the blade and an outlet port arranged at the opposite side of the blade, means closing the end ofthe cylinder, and a pressure casing enclosing the cylinder block.

4. A pump, comprising a block having a cylinder chamber therein, a slot in the block radially entering the cylinder, a blade .slidable in the slot, a'shaft extending throu h the cylinder, an eccentric mounted Aon t e shaft, roller bearings surrounding the eccentric, a ring encircling the roller bearings and engaging the wall of the cylinder eccentrically and operatively enga ing said blade, a

'pressure casing enclosing t e cylinder block,

said block having an inlet port therein leading to the'cylinder chamber at one side of the blade, a port leading from the chamber at the opposite side of the blade, and a lubricating port connected with the pressure chamber and leading to the interior of the eccentric ring.

5.Y A pump, comprising a casing having an open side, a cap closing said open side and having a journal bearing, a shaft journalled in said bearing, an eccentric 4rotor mounted on the shaft, a cylinder block se'- cured'to said cap, a blade slidably arranged .-,in the cylinder block and engaging/'said rotor, and a cap closing the inward side of the cylinder block having a journal bearing for the shaft, said former cap having an inlet port therein leading tov the cylinder chamber in the cylinder block, the other ca having a port therein leadin from the cy inder chamber, said shaft aving an groove, a cylinder secured to the inner side of the cap and communicating with the inf' let ort, a reciprocable bladearranged in the cylinder at one side of the inlet port, a rotor eccentrically mounted on the shaft operatlng in the cylinder and engaging said blade, and

a cap c osing the inner side of the cylinder and having an outlet port arranged at the opposite side of' the blade to the inlet port, said cap havin a journal bearing for the end of the sha t, and said shaft having an opening in the end thereof communicating with said outlet port. l

7;A pump, comprising a closed casing having a journal bearing in one side thereof and an inlet port opening into the face of the casing adjacent to the bearing, a cylinder block formed of a solid block of metal slotted radially from its cylinder chamber through to its outer side and having a cylindrical orifice intersecting the outer end of the slot, a blade slidably arranged in said slot, saidtblade having a slot therein registering with the cylindrical orifice, a spring enclosed in said cylindrical orifice and arranged within the slot in the blade, a hollow taper kthreaded yplu threaded into the bottom lend of the cylin rical orifice, a shaft from the pressure casing, a bailied chamber-l in the top of the pressure' casing communicatingwith said outlet, said chamber having a slopm bottom, an oil return to the interior of` e ressure casing leadinv from the bottom of t e baille chamber ando oil sealed at the inner end, and an outlet from the end of the "baille chamber.

WILLIAM' HENRY DAVENPORT BROUSE. v 

